Coin in Grinder

I know that putting a coin in a grinder helps collect more keif but I have a 5 piece grinder. Do I put the coin on top of the top screen with the bigger holes or the bottom screen? I figure the bottom screen would knock it into the catching area but the top screen comes in contact with more bud so idk.

My grinder is a cheap one. Its got the spikes on it, with just one screen. Well, I put a coin in the collection part, and yes, there is more keif in there, microgram per microgram......but the penny also increases the surface area inside your grinder. A bunch of keif ended up sticking to my penny and then I didnt want to scrape it off and smoke it because of how dirty coins are, (seriously its gross).

I also damaged my screen, and I barely shook it, I took it out and my weed spilled into the keif part.

all in all, if you want your screens to last, dont do it.

I would recommend a keif box over a grinder if you want to get more keif out of bud.

Personally i never use a coin in my grinder, especially after it left a big ole dent in the center. Yea you do get a lot more kief/plant material in your bottom chamber by using a coin, but at the expense of damaging your screen.

So if you still really want to put a coin in knowing you have a high probability of damaging your screen go ahead. But i would definitley not reccommend it. I have had 3 of my friends actually have their screen pop out and bascially destroy the grinder(or kief collecting ability atleast) due to them shaking a coin around. And yet they still put a coin in their new grinders beyond me lol.

I also heard to use a coin. Mine was a single screen SharpStone grinder. At first i used a nickel and everything was fine, even with the shaking. I decided bigger was better, so i used a quarter. Lasted for a long time, but then finally knocked my screen out, now i have no screen. No coin.. no coin!